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Science & Tech > Anatomy > Vertebrate


Now updated for CSW15. New words, if any, and new inflections of existing words, are shown in red.


abomasal relating to the abomasum, the fourth of the four stomachs of a ruminant.
abomasum (Lat.) the fourth of the four stomachs of a ruminant.
abomasus (Lat.) the fourth of the four stomachs of a ruminant.
abranchial lacking gills.
abranchiate lacking gills.
acaudal tailless.
acaudate tailless.
acephalic headless.
acerous of, like or resembling a needle.
acoelous not having a stomach.
acrodont having teeth fused with the jaw; (noun) an acrodont animal.
actinomere one of any opposite symmetrical or homotypic parts in animals and plants.
adactylous lacking fingers or claws.
agnathous lacking jaws, esp of hagfish and lampreys.
alar of or pertaining to the wing or shoulder.
alary of or pertaining to the wing or shoulder.
aliped having wings on the feet; (noun) a creature with winged feet.
ameboid resembling an amoeba; changing in shape like an amoeba.
amoebiform resembling an amoeba; changing in shape like an amoeba.
amphipodous having both walking and swimming feet.
anarthrous without distinct joints.
anarthrously (Adv.) ANARTHROUS, without distinct joints.
anarthrousness the state of being anarthrous.
anisocercal of fish, having unequal tail-lobes.
anourous having no tail.
antimere one of the two halves of bilaterally symmetrical animals.
antimeric of or like an antimere, one of the two halves of bilaterally symmetrical animals.
antimerism the state of having antimeres.
antler the horn of an animal of the deer family.
antlered bearing antlers.
anural having no tail.
anurous having no tail.
aplacental having no placenta.
apod an animal without feet or ventral fins.
apodal lacking feet.
apode an animal without feet or ventral fins.
apodous footless.
arthrodia in zoology, a joint.
arthrodial relating to arthrodia, a joint.
artiodactyl an animal having an even number of toes on each foot, such as pig, camel, cattle, deer.
artiodactylous of or like an artiodactyl, a two-toed animal.
backfat the layer of fat between the skin and muscle in animals.
baculum (Lat.) the penis bone in some mammals.
baleen whalebone.
befinned having fins.
bez the second tine of a deer's horn.
bicaudal having, or terminating in, two tails.
bicornate having two horns or hornlike parts.
bicornuate having two horns or hornlike parts.
bidental having two teeth; (noun) a creature having two teeth; a place struck by lightning then consecrated.
bimanous relating to Bimana, two-handed animals, an obsolete name for mankind.
bipedal having two feet; spec. using the hind limbs for locomotion.
bipedality the state of being bipedal, having two legs.
bipedally (Adv.) BIPEDAL, having two feet.
bisulcate cloven-footed.
blastopor the opening of the archenteron in the gastrula that develops into the anus of some animals.
blastoporal like a blastopor.
blastopore the opening of the archenteron in the gastrula that develops into the anus of some animals.
blowhole a hole for breathing through; the nostril of a whale etc.
bosset a rudimentary antler found on a young deer.
branchia (Lat.) a gill.
branchial of or relating to gills.
branchiate furnished with branchiae; as, branchiate segments.
bunodont having tuberculate molars.
calipash a part of a turtle which is next to the upper shell, aka carapace.
calipee a part of a turtle which is attached to the lower shell, aka plastron.
callipash a part of a turtle which is next to the upper shell.
callipee a part of a turtle which is attached to the lower shell, aka plastron.
cambrel the joint in the upper part of a horse's hind leg, the hock.
carapace the shell of an animal such as a turtle or armadillo.
carapaced having a carapace.
carapacial of or like a carapace.
carapax the shell of an animal such as a turtle or armadillo.
cauda the area behind an animal's anus.
caudal of or pertaining to the tail.
caudally (Adv.) CAUDAL, of or pertaining to the tail.
caudated having a tail.
caudation the state of being caudate, with a tail.
celom (Greek) a fluid-filled cavity within the body of an animal.
celomic of or like a celom, a fluid-filled cavity within the body of an animal.
cephalate having a head.
cercal of or pertaining to the tail.
cheekpouch a dilatation of the cheek forming a bag, eg as in a chipmunk.
chlamydate of molluscs, having a mantle.
chondroskeleton the cartilaginous part of the skeleton of vertebrates.
chordate having a backbone; (noun) an animal having a backbone.
clasper a clasping organ.
cloot (Scots) a division of a cloven hoof.
coelom (Greek) a fluid-filled cavity within the body of an animal.
coelomata animals having a coelom, of the group Coelomata, which includes the annelids, molluscs, arthropods, echinoderms, and chordates.
coelome (Greek) a fluid-filled cavity within the body of an animal.
coelomic relating to the coelom, a fluid-filled cavity within the body of an animal.
cormus (Lat.) the differentiated body of a cormophyte; the whole body of a compound animal.
corneous horny.
cornute with hornlike outgrowths; (verb) to cuckold.
coronoid pertaining to or designating projections of bone likened to a crow's beak.
cosmin a substance resembling dentine forming the outer layer of cosmoid scales.
cosmine a substance resembling dentine forming the outer layer of cosmoid scales.
cosmoid of the scales of coelacanths and lungfish, formed of two bony layers covered by a layer of cosmine.
cotyloid a small bone forming part of the acetabular cavity in some mammals.
cotyloidal a small bone forming part of the acetabular cavity in some mammals.
craniate having a skull or cranium; (noun) a craniate animal.
crena (Lat.) a notch or tooth.
crinate having hair.
crinated having hair.
crista (Lat.) a ridge or fold resembling a crest.
cristate with an appendage resembling a crest.
cristated with an appendage resembling a crest.
croche (Fr.) a knob at the top of a deer's horn.
crumen (Lat.) a deer's tear-pit.
crusta (Lat.) a hard coating a cocktail served in a glass, its rim coated with sugar
ctenoid with comblike edge, eg of fish scales.
curvicaudate having a curvy tail.
curvicostate having curved ribs.
cuticle any of various outer layers in a plant or animal, esp a noncellular protective film covering the epidermis in a plant or insect.
cuticular relating to a cuticle, any of various outer layers in a plant or animal.
cynopodous having claws that do not retract, as dogs.
denticle a small toothlike structure, as on the skin of a shark.
dewclaw a vestigial digit or claw.
dewclawed having a dewclaw.
dewlapped having dewlaps.
dewlapt having dewlaps.
dichoptic having eyes distinctly separate.
didactyl an animal having only two digits.
didelphic having a double womb, like a marsupial.
digitated of a leaf, divided into fingerlike parts.
diphycercal of fishes, etc, having the tail symmetrical about the vertebral column,
diphyodont having a second set of teeth that replaces the first; (noun) a diphyodont mammal.
diplozoic of animals, bilaterally symmetrical.
dorsal relating to the back, situated on the back (noun) a dorsal fin
dorsally (Adv.) DORSAL, relating to the back.
dug the teat or udder of a female mammal.
duplicident of certain animals, such as rabbits, having two pairs of incisors in the upper jaw.
ecaudate tailless.
echinate prickly like a hedgehog, bristly.
echinated prickly like a hedgehog, bristly.
edental without teeth, as of anteaters, armadillos, and sloths.
edentate without teeth; (noun) an edentate animal, as an armadillo or sloth.
electrocyte a specialized muscle or nerve cell that generates electricity.
encolure (Browning) a horse's mane.
endoskeletal relating to the endoskeleton.
endoskeleton an internal skeleton or supporting framework in an animal.
enterate having an alimentary canal.
entoplastral relating to the entoplastron, the unpaired plate behind the epiplastra in a turtle's plastron.
entoplastron the unpaired plate behind the epiplastra in a turtle's plastron.
epignathous having a protruding upper jaw.
epiplastral relating to an epiplastron, either of the two anterior lateral plates in the plastron of a turtle.
epiplastron either of the two anterior lateral plates in the plastron of a turtle.
episternum a median bone connected with the sternum.
excaudate tailless.
exuviae (Lat.) cast-off skins, shells or other coverings of animals; fossil remains of animals.
exuvial of or pertaining to exuviae, cast skins, shells, or coverings of animals.
exuvium (Lat.) the moulted covering of an animal.
falcula (Lat.) a curved and sharp-pointed claw.
falculate curved and sharp-pointed, like a falcula, or claw of a falcon.
fangless destitute of fangs or tusks.
fanglike like fangs.
fetlock a tuft of hair immediately above horse's hoof.
fetlocked having fetlocks.
filum (Lat.) a threadlike anatomical structure.
fimbria (Lat.) a fringe; any of the threads or other projections forming a fringe.
fimbrial pertaining to or having a fringe.
finless destitute of fins.
finny having fins.
fishbone a bone of a fish.
fissicostate having divided ribs.
fissilingual having a forked or cleft tongue.
fissiped with digits separate; (noun) a fissiped animal.
fissipedal having toes that are separated from one another, as dogs, cats, bears, and similar carnivores.
fissipede with digits separate; (noun) a fissipede animal.
flabelliform shaped like a fan.
flagelliform shaped like a whip.
flew the pendulous upper lip of a bloodhound or similar dog.
flewed (Shakesp.) furnished with hanging lips, as hounds are.
floccus (Lat.) the tuft of hair terminating the tail of mammals.
forefoot one of the front feet of a quadruped.
forehoof the hoof of a forefoot.
foreleg one of the front legs of an animal.
forelimb a front limb eg of a horse.
forepaw a front paw.
forequarter the front half of a lateral half of the body or carcass of a quadruped.
foreshank the upper part of the foreleg of cattle.
fossette (Fr.) a small hollow or depression, as in a bone or shell.
fossorial adapted for burrowing or digging, eg of claws.
fossula (Lat.) a small depression or groove.
foxtail the tail or brush of a fox.
frogeyed having frog eyes.
fud a rabbit's or hare's tail.
gambrel the joint in the upper part of a horse's hind leg, the hock.
ganoin the hard shiny substance resembling enamel which forms the outer layer of ganoid fish-scales.
ganoine the hard shiny substance resembling enamel which forms the outer layer of ganoid fish-scales.
gaskin the hind leg of horse between the stifle (knee) and hock (tarsal joint of the hind leg).
gizzard the second, or true, muscular stomach of birds, in which the food is crushed and ground.
glabrate smooth, esp having a surface without hairs or projections.
glabrous smooth, esp having a surface without hairs or projections.
glabrousness the state of being glabrous.
gressorial adapted for walking.
gressorious adapted for walking.
hardparts the skeletal parts of an organism.
heterocercal having the vertebral column passing into the upper lobe of the tail, which is usually larger than the lower, as in sharks.
heterocercality the state of being heterocercal.
heterocercy the state of being heterocercal.
hindfoot a rear foot.
hindleg a rear leg.
homocercal of fishes, having the upper and lower lobes of the tailfin alike.
homocercy the condition in fish of having a symmetrical tail.
hoof the hard covering of animal's foot (verb) to dance
hoofless destitute of hoofs.
hooflike like a hoof.
horn a hard, bonelike projection of the head (verb) to form a horn
hornedness the condition of being horned.
hornless having no horns.
hornlessness the state of being hornless.
hornlet a little horn.
hough a large beast's tendon; (verb) to cripple by tying the legs together.
hyoplastral of or like a hyoplastron.
hyoplastron in a turtle's plastron, a plate between the hypoplastron and the entoplastron.
hypognathous having the lower jaw or mandible protruding.
hypoplastron the plate behind the hyoplastron in a turtle's plastron.
hypural situated beneath the tail.
imparidigitate having an odd number of fingers on each limb.
indumentum (Lat.) a total body covering of hair, fur or feathers.
interneural situated between the neural spines or spinous processes of successive vertebrae.
iridocyte a cell in the skin of a fish that gives the fish iridescence.
jawless without jaws.
jubate having or possessing a mane.
keratose of certain sponges, having a horny skeleton.
kype the hook on the lower jaw of a mature male salmon.
labium (Lat.) a lip, or liplike organ.
languet (Fr.) a tonguelike appendage or outgrowth.
languette (Fr.) a tonguelike appendage or outgrowth.
laniferous wool-bearing.
lanigerous wool-bearing.
lanuginose downy; covered with fine soft hair.
lanuginous downy; covered with fine soft hair.
leptocercal slender-tailed.
lobus (Lat.) a lobe.
longicaudate long-tailed.
loppy pendulous (noun) in Australia, a man employed to do maintenance tasks on a ranch
loricate covered with an armor, such as scales or bony plates on reptiles; (verb) to coat or armour protectively.
lytta (Lat.) a small ligament in a dog's tongue.
macrodactyl of an animal, having long fingers or toes; (noun) one of a group of wading birds.
mammate having breasts.
maned having a mane.
maneless without a mane.
maniplies the third stomach of a ruminant, aka omasum or psalterium.
manubrial shaped like a handle.
manyplies the third stomach of a ruminant, aka omasum or psalterium.
marsupium (Lat.) the pouch, formed by a fold of the skin of the abdomen, in which marsupials carry their young.
megalopic having large eyes.
merome one of the serial segments, or metameres, of which the bodies of vertebrate and articulate animals are composed.
merosome one of the serial segments, or metameres, of which the bodies of vertebrate and articulate animals are composed.
mesoblast another name for the mesoderm, the middle germ layer of the embryo in early development.
mesoblastic like a mesoblast.
mesomere an embryonic segment.
metameric relating to a metamere, a serial division or segmentation of a body.
metamerically (Adv.) METAMERIC, relating to a metamere, a serial division or segmentation of a body.
microdont having unusually small teeth.
moniplies the third stomach of a ruminant, aka omasum or psalterium.
monocardian having an undivided heart; (noun) a creature that has only one heart.
monocerous having only one horn.
monodactylous one-toed or one-fingered.
monodont one-tusked, like a narwhal.
monophyodont an animal with only one set of teeth.
monyplies the third stomach of a ruminant, aka omasum or psalterium.
mouthless destitute of a mouth.
mouthpart part of a mouth.
multungulate having the hoof divided into more than two parts; (noun) a multungulate animal.
muzzle to put a covering over the mouth of to prevent biting or eating.
neuromast a sensory cell in fish.
notochord a backbone-like series of cells in the lowest vertebrates.
notochordal relating to the notochord, a backbone-like series of cells in the lowest vertebrates.
nudicaudate with hairless tail.
oculate having eyes.
oculated having eyes.
odontostomatous having biting or toothed jaws.
omasal relating to the omasum, the third of the four stomachs of a ruminant.
omasum (Lat.) the third of the four stomachs of a ruminant.
opercele an anatomical part that serves as a lid or cover.
oscule a small mouthlike aperture.
osselet a hard substance growing on the inside of a horse's knee.
ostiate having an ostium (a mouthlike opening) or ostia.
overhair the long hair overlying the fur of some animals.
packwax the strong tendon in an animal's neck.
palamate webfooted.
paleate having scales.
paries (Lat.) a wall of hollow organ or cavity.
parotoid any of various glands which form warty excrescences behind the eyes in some amphibians, esp toads.
pastern the part of horse's foot between the fetlock joint and the upper edge of the hoof.
patagial of or like a patagium, a web of skin between the forelimbs and hind-limbs of tree-dwelling creatures.
patagium (Lat.) a web of skin between forelimbs and hind-limbs of tree-dwelling creatures, that acts as a wing, as in bat or flying squirrel.
paw a clawed foot; (verb) to scrape with a paw.
paxwax the strong tendon in an animal's neck.
pecten (Lat.) a comblike structure of various kinds eg in a bird's or reptile's eye.
pedicled having pedicles, bony protrusion of the skull from which an antler grows.
pelage (Fr.) an animal's coat of hair or wool.
pelon a hairless person or animal.
pentadactyl having five fingers or toes to each hand or foot; (noun) a pentadactyl animal.
pentadactylic having five digits.
pentadactylism the state of being pentadactylic.
pentadactylous having five digits.
perennibranch retaining the gills throughout life; (noun) a perennibranch creature.
peristomatic relating to the peristome, the area, or a structure, surrounding a mouth.
peristome the area, or a structure, surrounding a mouth.
peristomial relating to the peristome, the area, or a structure, surrounding a mouth.
pholidosis the arrangement of scales, as in fish and reptiles.
photogen a light-producing organ in animals.
photogene an afterimage.
placoid having platelike scales; (noun) a fish with platelike scales.
plantigrade walking on the soles of the feet, as humans do; (noun) a plantigrade animal.
pleopod a swimming leg (an abdominal appendage of shrimps, lobsters, and isopods for locomotion or respiration).
pleurodont with teeth attached to the inside of the jawbone, rather than rooted in it; (noun) a pleurodont animal, such as a reptile.
podophthalmous having eyes on stalks, like some crabs.
postaxial situated behind any transverse axis in the body of an animal.
postocular behind the eye; (noun) a scale situated behind the eye of some lizards.
preaxial situated in front of any transverse axis in the body of an animal.
preaxially (Adv.) PREAXIAL, situated in front of any transverse axis in the body of an animal.
precaudal in front of the caudal fin.
prehensile adapted to seize or grasp, esp by wrapping round; as, the prehensile tail of a monkey.
prehensility the state of being prehensile.
prehensive prehensile, related to grasping.
prehensor something that grasps or seizes.
prehensorial prehensile, related to grasping.
prehensory adapted to seize or grasp; prehensile.
premandibular in front of the lower jaw; (noun) a bone so placed in fishes, etc.
prepollex (Lat.) in some animals, a rudimentary innermost finger.
prepubis the animal hip bone.
prosoma the anterior of the body of an animal, as of a cephalopod; the thorax of an arthropod.
prosomal relating to the prosoma, the anterior of the body of an animal.
protrusile that can be protruded.
psalterium (Lat.) the third stomach of ruminants.
pseudopodium a process protruding from the cell of a protozoan, etc, used for movement or feeding.
pterion (Greek) a suture in the skull.
pterygial of or relating to a wing or fin; (noun) a bone in a fin.
pterygium a vertebrate limb.
pulvillar cushion-like.
pygal the posterior median plate of a chelonian carapace.
quadrumanous of apes, etc., with all four feet adapted for use as hands.
quadrupedal having four feet.
radulate having a radula, a mollusc's tongue, that is studded with tiny teeth.
raphe (Lat.) a seamlike junction.
reticulum (Lat.) the second stomach of a ruminant.
rhodophane the red pigment contained in the inner segments of the cones of the retina in animals.
ribless having no ribs.
rictus (Lat.) a gaping mouth; an orifice.
rumen (Lat.) the first of the four stomachs of a ruminant.
ruminal of or like the rumen.
sac in biology, a baglike structure.
salpiform shaped like a barrel.
sawtooth one of a set of teeth resembling a saw, as on certain sharks.
scaleless destitute of scales.
sclerite a hard chitinous or calcareous process or corpuscle, esp a spicule of the Alcyonaria.
scleritic of or like a sclerite, a hard chitinous or calcareous process or corpuscle.
sclerodermatous hard-skinned; having bony armour.
sclerodermic hard-skinned; having bony armour.
sclerodermite the integument of a segment in arthropods.
sclerodermous hard-skinned; having bony armour.
sclerotal a sclerotic bone or plate.
scopa (Lat.) a brushlike tuft on back legs or abdomen of bees.
scut the tail of eg a rabbit.
scute a hard exoskeletal plate.
scutellar like a scutella, a small scute, a hard exoskeletal plate.
scutellate shaped like a platter; covered with scutellae.
scutellated shaped like a platter; covered with scutellae.
scutellation an arrangement of scales or plates on an animal's body.
scutum (Lat.) a hard exoskeletal plate.
secodont having cutting teeth; (noun) an animal having cutting teeth.
sectorial adapted for cutting; (noun) a tooth designed for flesh-eating.
selenodont having crescent-shaped ridges on the crowns of the molar teeth; (noun) a selenodont animal.
sensilla (Lat.) in insects, a small sense organ on the integument.
sensillum (Lat.) in insects, a small sense organ on the integument.
septal of or pertaining to a septum or septa, as of a coral or a shell.
sericterium a silk spinning gland.
serra (Lat.) a serrated organ, structure, or edge.
seta (Lat.) a bristle; any bristlelike organ.
setal like a bristle.
setose thickly set with bristles or bristly hairs.
setous thickly set with bristles or bristly hairs.
setule a small bristle.
setulose having small bristles or setules.
setulous having small bristles or setules.
siphonate having a siphon or siphons.
snout the projecting muzzle of an animal, esp a pig (verb) to provide with a snout
snoutish like a snout.
snoutlike like a snout.
snouty resembling a beast's snout.
solidungulate an animal with an uncloven hoof.
solidungulous having a single hoof on each foot.
solipedous having single hoofs.
soma (Greek) the whole axial portion of an animal, including the head, neck, trunk, and tail.
somital relating to a somite, the body segment of a vertebrate embryo.
somite the body segment of a vertebrate embryo.
somitic relating to a somite, the body segment of a vertebrate embryo.
soricident having teeth like a shrew's.
spald (Scots) the shoulder, esp of an animal used as food.
spalle (Spenser) the shoulder, esp of an animal used as food.
spaul (Scots) the shoulder, esp of an animal used as food.
squama (Lat.) a scale.
squamate like, having or covered with scales; (noun) a creature covered with scales.
squame a scale.
squamosal a paired membrane bone of the vertebrate skull, the squamous portion of the temporal bone.
squamose like, having or covered with scales.
squamosely (Adv.) SQUAMOSE, like, having or covered with scales.
squamous like, having or covered with scales.
squamously (Adv.) SQUAMOUS, like, having or covered with scales.
squamule a little scale.
squamulose covered with very small scales, as in snakes.
statocyst an organ of balance in some invertebrates.
subcaudal situated under, or on the ventral side of, the tail; as, the subcaudal bones.
subterminal of a band or stripe, situated before the tip of the tail.
suctorial designed for sucking or adhering.
surroyal one of the terminal branches or divisions of the beam of the antler of the stag or other large deer.
suspensorial of or like the suspensorium.
suspensorium that which holds up a part, esp the arrangement joining the lower jaw to the cranium in vertebrates below mammals.
sweetbread the thymus gland of a young animal.
syndactyl with digits joined together; (noun) an animal with digits joined together.
syndactyly the state of being syndactyl, with digits joined together.
syngnathous of certain fish, having the jaws fused to form a tubular structure.
tagma (Greek) any of the distinct regions of the body in arthropods.
tail a hindmost part; (verb) to provide with a tail.
tailless without a tail.
taillessly (Adv.) TAILLESS, without a tail.
talant (Spenser) talon.
talaunt (Spenser) a talon.
tapetal relating to the tapetum, a reflective layer of the choroid in the eyes of many animals.
tapetum (Lat.) a reflective layer of the choroid in the eyes of many animals, causing them to shine in the dark.
teat the small protuberance through which the mammalian young suck the milk.
teated having teats.
tectorial covering, eg a tectorial membrane.
tegument the natural covering of an animal or plant body.
tegumental of or like a tegument.
tegumentary of or like a tegument.
teleostome with membrane bones in the skull, jaws etc, as with any ordinary fish except skates and rays; (noun) a teleostome fish.
telson (Greek) the last segment of the abdomen, or an appendage to it, in crustaceans and arachnids.
telsonic relating to a telson, the last segment of the abdomen in many arthropods.
tentacle an elongated, flexible appendage of some animals.
tentaculate like a tentacle.
tentaculoid like a tentacle.
tentaculum a tentacle.
testaceous having a hard shell; brick-red.
testudinal like a tortoiseshell or testudo.
tetradactyl a four-toed animal.
tetradactyly the state of being a tetradactyl, a four-toed animal.
tetrapodous having four feet.
tewel a chimney; the rectum or anus of a horse.
thurl the hip-joint in cattle.
tibiofibula a bone esp in frogs and toads that is formed by a fusion of the tibia and fibula.
trematic of the gill-slits.
trifid cleft to the middle, or slightly beyond the middle, into three parts; three-cleft.
trilobal having three lobes.
triploblastic having an ectoderm, mesoderm, and endoderm, as in most animal groups other than coelenterates.
trotter a foot, esp of a sheep or pig.
trunk the main stem of a tree.
trunked having a trunk.
tuberculate bearing tubercles, knobbly projections or excrescences.
tuberculated bearing tubercles, knobbly projections or excrescences.
tuberculately (Adv.) TUBERCULATE, bearing knobbly projections or excrescences.
tunica (Lat.) an enclosing membrane or layer of tissue.
tuskless without tusks.
tusky having tusks.
udder a mammary gland.
uddered having udders.
udderless destitute or deprived of an udder.
uncus (Lat.) a hook or hooklike process or structure.
uneyed not having eyes.
ungual of or bearing a claw, hoof, or talon.
unguiculate having claws or nails; (noun) an animal having claws or nails.
unguiculated clawed, clawlike.
unguis (Lat.) a claw or nail.
ungula (Lat.) a hoof, claw, or talon.
ungular of or like an ungula, a hoof, claw, or talon.
ungulate having hooves; (noun) a hoofed animal.
unguligrade walking on hoofs.
urceolus (Lat.) a pitcher-shaped sheath or structure, as the tube in which some rotifers live.
urochord the central axis or cord in the tail of larval ascidians and of certain adult tunicates.
uromere any one of the abdominal segments of an arthropod.
urosome the abdomen, or post-abdomen, of arthropods.
urostege (Greek) a snake's ventral tail-plate.
urostegite a snake's ventral tail-plate.
urosthenic having a tail designed for propulsion.
urostyle a prolongation of the last vertebra in frogs, toads, etc.
varix (Lat.) a varicose swelling; a ridge on the surface of eg a snail's shell.
vell the fourth stomach of a calf, aka abomasum.
ventral pertaining to the underside or the belly (noun) a ventral fin
ventrally (Adv.) VENTRAL, pertaining to the underside or the belly.
vertebrated having a backbone.
vestibulum (Lat.) a cavity into which, in certain bryozoans, the esophagus and anus open.
vibrissa (Lat.) a sensitive whisker on animal's face.
vibrissal like a vibrissa, a sensitive whisker on an animal's face.
viperiform shaped like a snake or viper.
webfoot a foot the toes of which are connected by a membrane.
webfooted having webbed feet.
xenarthral having additional facets on the dorsolumbar vertebrae, like sloths, anteaters and armadillos.
xenophya (Greek) elements of a shell or skeleton not secreted by the organism itself.
xiphiplastron in chelonians, one of the plates forming the plastron, lying posterior to the hypoplastron.
zalambdodont having molar teeth with V-shaped ridges, as some Insectivora do; (noun) an animal having such teeth.
zoecium (Greek) the body wall or enclosing chamber of a polyzoan individual.
zooecium (Greek) the body wall or enclosing chamber of a polyzoan individual.
zoonite one of the segments of the body of an articulate animal.
zoonitic like a zoonite, one of the segments of the body of an articulate animal.
zoothecial of or like a zoothecium, the tubular sheath of certain infusorians.
zoothecium the tubular sheath of certain infusorians.
zygantrum (Greek) in snakes and some lizards, an additional vertebral articulation.
zygodont relating to molar teeth whose cusps are paired.
zygosphene a median process on the front part of the neural arch of the vertebrae of most snakes and some lizards, which fits into a fossa, called the zygantrum, on the back part of the arch in front.